Improvement in artificial fuel



UNITED STATES QFFIcE;

SAMUEL OABOT, JR, or BOSTON, MASsAcnusETTs.

IMPROVEMENT IN ARTIFICIAL FUEL.

Specification forming part of Letters Patent No. [87,508, dated February20, 1877; application filed October 31, 1876.

To all whom it may concern:

Be it known that I, SAMUEL GABOT, Jr., of Boston, in the county ofSuffolk, State of Massachusetts, have invented a new and usefulcompound, as being chiefly composed of ligneous fiber, which compound,and the method of making it, aredescribed in full in the followingspecification This invention comes under the head of that class ofcompounds known as artificial fuels; and it consists in a compositionformed from spent dyewood, tan-bark, sawdust, or other Waste vegetablefiber, made to cohere by mixing while Wet with very finely-powdered hardcoal-tar or asphaltum residuum from which the volatile portion has beendistilled, until the mass is hard and brittle on cooling, and thenheating and compressing into suitable form For burning.

To prepare this compound, take about ten (10) parts of spent dyewood,tan, Sawdust, or other waste vegetable fiber; moisten, if not alreadymoist; then carefully and thoroughly mix in from one to five parts ofvery finelypowdered coal-tar or asphaltum residuum 5 heat Slowly tillthe mass is dry, and then raise the temperature to about themelting-point of the tar or asphaltum residuum, and while hot compressinto cakes in any suitable machine as, for instance,a brick-machine.

The advantage of having the woody fiber moist is that the fine coal-taradheres to the surfaces of the larger pieces, and in drying andsubsequent heating a glaze of melted tar is formed, which insurescohesion as soon as pressure is applied.

I claim I An artificial fuel, composed of spent dyewoods, tan, sawdust,or other waste vegetable matter, and finely-powdered coal-tar orasplialtum residuum, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this30th day of October, 1876.

SAMUEL OABO'I, JR.

Witnesses:

HENRY W. SEYMOUR, THOMAS B. HALL.

